本次工程采用下挖式消力池，为了便于施工，消力池底板做成等厚，为了降低护

本次工程采用下挖式消力池，为了便于施工，消力池底板做成等厚，为了降低护坦底部的渗透压力，可在护坦下设铅直排水孔，并在护坦底部铺设反滤层，排水孔设在水平底板的后半部，排水孔直径为10cm，间距为2.0m，呈梅花形布置。反滤层厚为30cm，分三层，从上到下依次为10cm碎石，10cm中砂，10cm粗砂。<br>消力池首端宽度为92.5m，消力池扩散角设置为10°，则消力池末端宽度为100.7m。<br>消力池构造尺寸见图5-2。

本次工程采用下挖式消力池，为了便于施工，消力池底板做成等厚，为了降低护坦底部的渗透压力，可在护坦下设铅直排水孔，并在护坦底部铺设反滤层，排水孔设在水平底板的后半部，排水孔直径为10cm，间距为2.0m，呈梅花形布置。 反滤层厚为30cm，分三层，从上到下依次为10cm碎石，10cm中砂，10cm粗砂。<br>消力池首端宽度为92.5m，消力池扩散角设置为10°，则消力池末端宽度为100.7m。<br>消力池构造尺寸见图5-2。

In this project, the undercut stilling basin is adopted. In order to facilitate the construction, the stilling basin bottom plate is made of equal thickness. In order to reduce the seepage pressure at the bottom of the apron, a vertical drainage hole can be set under the apron, and a reverse filter layer can be laid at the bottom of the apron. The drainage hole is set at the back half of the horizontal floor plate, with a diameter of 10cm and a spacing of 2.0m, arranged in a quincunx shape. The thickness of the inverted filter is 30cm, divided into three layers, from top to bottom are 10cm gravel, 10cm medium sand and 10cm coarse sand.<br>The width of the head end of the stilling basin is 92.5m, the diffusion angle of the stilling basin is set to 10 °, and the width of the end of the stilling basin is 100.7m.<br>See Figure 5-2 for the structural dimension of stilling basin.<br>